What is the difference between single-cylinder and four-cylinder engines?

[ArielLee]

Single-cylinder and four-cylinder engines differ in that single-cylinder engines have stronger vibrations, while four-cylinder engines operate more smoothly. Single-cylinder engines have stronger vibrations: Single-cylinder engines are the foundation of all engines. In a single-cylinder engine, the crankshaft completes two rotations for each combustion cycle. They have a simple construction, are compact, and are easier to maintain compared to multi-cylinder engines. However, since the piston moves up and down, they produce strong vibrations, which also results in less pleasant exhaust sounds. Four-cylinder engines operate smoothly: Common four-cylinder engines are divided into inline-four and V4 configurations. Among all, the four-cylinder stands supreme. Simply put, an inline-four engine arranges four single-cylinder engines side by side. It has minimal vibrations, operates smoothly, and offers high combustion efficiency, delivering high power output. The exhaust sound is far superior to that of twin-cylinder and single-cylinder engines, making it commonly used in high-performance street bikes and sport bikes.